Data Engineering designing, building, and maintaining systems that collect, process, and store large volumes of data efficiently. It involves data pipelines, ETL processes, data warehousing, cloud platforms, and database management. Data engineers use tools like Python, SQL, Apache Spark, Hadoop, and Snowflake to ensure reliable data flow. Enrolling in a Data Engineering Course in Chennai at FITA Academy helps learners gain practical experience in data integration, pipeline automation, and cloud technologies, preparing them for career opportunities in data engineering and analytics.